Hypodermic syringe



April 6, 1954 E. J. BOWER 2,674,246

HYPODERMIC SYR INGE Filed March 14, 1952 INVENTOR Earl Jfiower ATTORNEY5Patented Apr. 6, 1954 UNITED STATES PATENT OFFICE HYPODERMIC SYRINGEEarl J. Bower, Wilkes-Barre, Pa.

Application March 14, 1952, Serial No. 276,558

3 Claims. 1

This invention relates to hypodermic syringes.

An object of this invention is to provide in combination with ahypodermic syringe and needle, means whereby initial pressure may beapplied to the area which is to be penetrated by the needle so as tolessen the shock to the patient when the needle punctures the skin.

Another object of this invention is to provide an attachment for ahypodermic syringe and needle which will encompass the needle and serveas a guide for the needle and syringe.

A further object of this invention is to provide an attachment of thiskind which includes a relatively soft pressure member adapted to bepressed against the part to be punctured, the pressure member projectingbeyond the needle so that a timid or highly sensitive patient will notbe scared when the needle is projected into the desired spot.

A further object of this invention is to provide in a hypodermic syringea combined guide and pressure member so that the needle may be projectedinto the patient without the patient jerking away when the needlepunctures the tissue.

With the above and other objects in view, my invention consists in thearrangement, combination and details of construction disclosed in thedrawings and specification, and then more particularly pointed out inthe appended claims.

In the drawing:

Figure 1 is a detailed side elevation of a hypodermic syringe having anattachment mounted thereon constructed according to an embodiment ofthis invention.

Figure 2 is a fragmentary sectional view taken on the line 2--2 ofFigure 1.

Figure 3 is a sectional view taken on the line 3-3 of Figure 2.

Referring to the drawing, the numeral Hldesignates generally aconventional hypodermic syringe embodying a cylinder II with a plunger[2 slidable therein. The forward end of the cylinder l I is providedwith a reduced nozzle i3, and a hypodermic needle l4 having a socket H5at its inner end is mounted on the nozzle l3.

In order to provide a means whereby the needle [4 may be enclosed and,at the same time, whereby pressure may be applied on the part into whichthe needle is to be projected, I have provided cylindrical member l6which removably engages about the forward portion of the syringecylinder H. The tubular member l6 has mounted in the forward end thereofa plug I! having a central bore l8, and the outer end of the plug 11 hasformed integral therewith a relatively soft head [9. As shown in Figure1, the forward end of the tubular member I6 is disposed on an obliqueangle, and the head I9 is also disposed on an oblique angle so that thetubular member It may be projected into the mouth of a patient with thehead l9 disposed fiatwise with respect to the part into which the needleis to be projected.

A relatively small diameter tube 20 encompasses the greater portion ofthe needle l4 and is formed at its inner end with an enlarged socket 2|telescoping over the needle socket l5. The outer diameter of the tube 20is such that this tube may readily slide into the bore I8 when thesyringe II, with the needle, is moved forwardly to operative position.

A spring 22 engages loosely about the tube 20 and bears, at its forwardend, against the inner end of the plug I1 and bears, at its opposite orinner end, against the socket 2|. The spring 22 provides a means wherebythe tubular member or guide IE will be normally disposed in a coveringposition with respect to the needle i i.

In the use of this device, the tubular member [6 is engaged about thesyringe cylinder ii, and the tubular member I6 is then extended into themouth of the patient against the part which is to be punctured by theneedle. Pressure is applied to the cushioned head It, and then thecylinder ll may be pushed inwardly until the needle l4 punctures thetissue which is pressed by the head l9. The plunger I2 may then be movedinwardly to force the liquid through the needle l4 into the part whichis punctured by needle l4. This attachment will provide a means wherebyinitial pressure may be applied to the patient on the tissue or areawhich is to be punctured so that the subsequent puncturing of the tissueby the needle will not cause the patient to become scared. Furthermore,in view of the application of pressure on the spot which is to bepunctured, the patient will not readily feel the needle when the needleis puncturing the tissue.

The attachment hereinbefore described is of such character that it canbe readily sterilized at the time the needle and syringe are sterilized,and the needle will not readily be made unsterile before the needle hasbeen used.

While described herein as for a hypodermic syringe, it will beunderstood this is meant in a generic sense as obviously this may applyto other syringes for other uses. The head it may also if desired, bemade of absorptive material to hold an antiseptic preparation or may beimpregnated with antiseptic matter or alterna- 3 tively, a material toinduce a superficial anaesthesia for the needle penetration. The shapeof the head I9 is variable although as shown, it is in the mostdesirable form.

I do not mean to confine myself to the exact details of constructionherein disclosed, but claim all variations falling within the purview ofthe appended claims.

What is claimed is:

1. A pressure applying attachment for a hypodermic syringe having aneedle comprising an elongated tubular member loosely engageable.

over the forward end of the syringe andencompassing said needle, a plugin the forward end of said member having a bore coaxial; with theneedle, a relatively soft cushion, head carried by said plug, saidneedle including'aninner tube loosely disposed about the needle, asocketcarried by said tube engaging the inner end of said needle, and. aspring about said. tube. bearing at its outer end against said plugandbearing at its inner end against said. socket, said spring normallyholding saidmember in needle encompassing position.

2, A pressure applying attachment fora hypodermic syringe having aneedle, said attachment comprising an elongated tubular member looselyengageable over the forward, end of the syringe and encompassing saidneedle, a plug in the forward end of said member having a bore coaxialwith the needle, and a relatively soft cushion head carried by saidplug, said head carrying superficial anaesthesia inducing material.

3. An attachment for use with a hypodermic or like syringe of the typehaving a cylinder, a plunger, a needle, and means for securing theneedle to the cylinder, said attachment comprising an elongated openended tubular member adapted to fit at one end over and to looselyengage an end portion of said syringe cylinder and to encompass saidneedle and needle securing means, said tubular member having at itsother end extending partially therein, a soft-nosed plug having an axialbore in alignment with said syringe needle, a lengthwise extendingcoiled spring disposed within said tubular member and having one endabutting the inwardly extended end of said plug, and a second elongatedopen ended tubular member mounted in said spring and onsaid needlesecuring means and encompassing said needle spacedly from said plug,said attachment being so constructed and assembled relative to saidsyringe that in the use thereof saidplug nose maybe utilized to positionsaid syringe and apply localized pressure to the area surrounding theselected point of injection and said spring will serve to instantlyretract said needle, and whereby said second tubular member will act toguide and aid in preventing bending and breakage of said needle andwhereby said needle may be rapidly inserted into and withdrawn from thepatient being treated.

References Cited in the file of this patent UNITED STATES PATENTS NumberName Date 1,845,036 Busher Feb. 16, 1932 1,921,034 La Marche Aug. 8,1933 2,512,882 Truesdale June 27, 1950 2,617,359 Van Horn et al Nov. 11,1952 FOREIGN PATENTS Number Country Date 455,036 France May 10, 1913

